diff options
| author | David Ahern <dsahern@gmail.com> | 2019-06-08 14:53:32 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-06-10 10:44:56 -0700 |
| commit | 493ced1ac47c48bb86d9d4e8e87df8592be85a0e (patch) | |
| tree | 03302235b6891c86e4e53d8ea7730f6c7135ce65 /net/ipv4/fib_frontend.c | |
| parent | 2d44234bf9ed45ba1b91e4bcc929ab15f8b6a901 (diff) | |
ipv4: Allow routes to use nexthop objects
Add support for RTA_NH_ID attribute to allow a user to specify a
nexthop id to use with a route. fc_nh_id is added to fib_config to
hold the value passed in the RTA_NH_ID attribute. If a nexthop id
is given, the gateway, device, encap and multipath attributes can
not be set.
Update fib_nh_match to check ids on a route delete.
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/fib_frontend.c')
| -rw-r--r-- | net/ipv4/fib_frontend.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c index 33b0dbe84aa6..108191667531 100644 --- a/net/ipv4/fib_frontend.c +++ b/net/ipv4/fib_frontend.c @@ -671,6 +671,7 @@ const struct nla_policy rtm_ipv4_policy[RTA_MAX + 1] = { [RTA_IP_PROTO] = { .type = NLA_U8 }, [RTA_SPORT] = { .type = NLA_U16 }, [RTA_DPORT] = { .type = NLA_U16 }, + [RTA_NH_ID] = { .type = NLA_U32 }, }; int fib_gw_from_via(struct fib_config *cfg, struct nlattr *nla, @@ -808,6 +809,18 @@ static int rtm_to_fib_config(struct net *net, struct sk_buff *skb, if (err < 0) goto errout; break; + case RTA_NH_ID: + cfg->fc_nh_id = nla_get_u32(attr); + break; + } + } + + if (cfg->fc_nh_id) { + if (cfg->fc_oif || cfg->fc_gw_family || + cfg->fc_encap || cfg->fc_mp) { + NL_SET_ERR_MSG(extack, + "Nexthop specification and nexthop id are mutually exclusive"); + return -EINVAL; } } @@ -834,6 +847,12 @@ static int inet_rtm_delroute(struct sk_buff *skb, struct nlmsghdr *nlh, if (err < 0) goto errout; + if (cfg.fc_nh_id && !nexthop_find_by_id(net, cfg.fc_nh_id)) { + NL_SET_ERR_MSG(extack, "Nexthop id does not exist"); + err = -EINVAL; + goto errout; + } + tb = fib_get_table(net, cfg.fc_table); if (!tb) { NL_SET_ERR_MSG(extack, "FIB table does not exist"); |